Recall and use the equation for kinetic energy E_k = ½mv²

Define the kilowatt-hour (kWh) and calculate the cost of using electrical appliances where the energy unit is the kWh

Define power as work done per unit time and also as energy transferred per unit time; recall and use the equations (a) power = work done / time taken, P = W/t (b) power = energy transferred / time taken, P = ΔE/t